Electronic book having multiple viewing panes



FIG. 1 is a front elevational view of an electronic book having multiple viewing panes showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines are shown for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an electronic book having multiple viewing panes, as shown and described. 